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docker-machine/docs/reference/env.md
Mary Anthony 39806c02e0 First stage of splitting out
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Updating with the comments from Nathan
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Signed-off-by: Mary Anthony <mary@docker.com>
2015-07-14 12:44:56 -07:00

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env

Set environment variables to dictate that docker should run a command against a particular machine.

docker-machine env machinename will print out export commands which can be run in a subshell. Running docker-machine env -u will print unset commands which reverse this effect.

$ env | grep DOCKER
$ eval "$(docker-machine env dev)"
$ env | grep DOCKER
DOCKER_HOST=tcp://192.168.99.101:2376
DOCKER_CERT_PATH=/Users/nathanleclaire/.docker/machines/.client
DOCKER_TLS_VERIFY=1
DOCKER_MACHINE_NAME=dev
$ # If you run a docker command, now it will run against that host.
$ eval "$(docker-machine env -u)"
$ env | grep DOCKER
$ # The environment variables have been unset.

The output described above is intended for the shells bash and zsh (if you're not sure which shell you're using, there's a very good possibility that it's bash). However, these are not the only shells which Docker Machine supports.

If you are using fish and the SHELL environment variable is correctly set to the path where fish is located, docker-machine env name will print out the values in the format which fish expects:

set -x DOCKER_TLS_VERIFY 1;
set -x DOCKER_CERT_PATH "/Users/nathanleclaire/.docker/machine/machines/overlay";
set -x DOCKER_HOST tcp://192.168.99.102:2376;
set -x DOCKER_MACHINE_NAME overlay
# Run this command to configure your shell:
# eval "$(docker-machine env overlay)"

If you are on Windows and using Powershell or cmd.exe, docker-machine env cannot detect your shell automatically, but it does have support for these shells. In order to use them, specify which shell you would like to print the options for using the --shell flag for docker-machine env.

For Powershell:

$ docker-machine.exe env --shell powershell dev
$Env:DOCKER_TLS_VERIFY = "1"
$Env:DOCKER_HOST = "tcp://192.168.99.101:2376"
$Env:DOCKER_CERT_PATH = "C:\Users\captain\.docker\machine\machines\dev"
$Env:DOCKER_MACHINE_NAME = "dev"
# Run this command to configure your shell:
# docker-machine.exe env --shell=powershell dev | Invoke-Expression

For cmd.exe:

$ docker-machine.exe env --shell cmd dev
set DOCKER_TLS_VERIFY=1
set DOCKER_HOST=tcp://192.168.99.101:2376
set DOCKER_CERT_PATH=C:\Users\captain\.docker\machine\machines\dev
set DOCKER_MACHINE_NAME=dev
# Run this command to configure your shell: copy and paste the above values into your command prompt